In order to do a false shuffle, you will need the following: a deck of cards.
You will need to display the cards, in order to show that they are still in order. Cut the deck of cards in half. Do a fake shuffle. Interlace the tips of the deck, which will give the illusion of shuffling. But, you will need to side shuffle them. In other words, only the corners will be laced together. You will need to conceal the back portion of the deck with one hand. Pretend to tap the deck together. Then, separate the two halves. Place the original top half of the deck on top. Then, display the deck again.